Research on Deformation Mechanism of Surrounding Rock during Excavation of Large-Span Shallow-Buried Double-Arch Tunnel

• DOI: 10.4028/www.scientific.net/amm.392.890
• Publication Date: 2013-09-03T14:26:10Z
• Authors: Shao Rui Sun; Ye Xu Lu; Shao Hua Zhang; Ji Min Wu
• Keywords: Settlement (finance)

The deformation mechanism of surrounding rock during excavation is difficult to stability evaluation for large-span shallow-buried double-arch tunnel. Take Fenghuang mountain tunnel in Suzhou city as an example, the main work and funding are follow: measured data middle tunnel, including settlement on top between two lateral walls, were used calculate mechanical parameters by back analysis method. obtained stress different steps. rules includes time-space effect excavation, force wall ground surface Finally, calculated compared monitoring results. safety coefficient was strength reduction theory.